Safety device for elevators



-(NOMode1.)

H H THAYER SAFETY DEVICE FOR ELEVATORS.

Patented Dec. 22, 1891.

ATTORNEY-F.

UNITED STATES PATENT OFFICE.

HORACE ll. THAYER, OF YONKERS, NE\V YORK.

SAFETY DEVICE FOR ELEVATORS.

SPECIFICATION forming part of Letters Patent No. 465,585, dated December 22, 1891.

Application filed April 29, 1891. Serial No- 390,938- (No model.)

T0 60% whom it may concern.-

Be it known that I, HORACE ll. THAYER, of Yonkers, \Vestchestercoun ty, NewYork, have invented an Improved Safety-Catch for Elevators, of which the following is a specification.

This invention relates to an automatic safety-catch for checking the descent of elevators in case of accident.

It consists in the various features of im provement more fully pointed out in the claim.

In the accompanying drawings, Figure 1 is a vertical transverse section of an elevator provided with my improved safety-catch on line on as, Fig. 3; Fig. 2, a vertical longitudinal section of the same on line y y, Fig. 8; Fig. 3, a top view, partly in section, of the same and with the roof of the elevator-cage removed; and Fig. 4, a side view of the catch, showing it applied.

The letter a represents the cage of an elevator.

Z) I) are the guide-posts, and c the operatingcable secured to the roof a of the cage, all as usual.

From the roof a project upwardly two or more bearings (Lin which turn the eccentric disks e, placed Opposite to the beams 17. These disks are provided with jointed levers e, the front arms of which are rigidly secured to the disks, while the rear arms carry adjustable weights 6 To the lever 6 there is attached,

by rope e the cable 0 in such a manner that the eccentrics e are held out of contact with the beams b. I prefer to connect the rope e to the lever e by means of a spring-bolt i,

passing through eyes 2', projecting upwardly from the lever e and engaging an eye 6*, secured. to the lower end of rope e Vheu the cable 0 snaps, the levers 6 will descend and the disks 6 will be tightly wedged against the beams Z). The lever-armsc will bend at the joint, Fig. 4, to increase the play of the front lever-arm, while the weight e will be supported by the car-roof. The bolts 1' are connected by bell-cranks f to ropes f. These ropes run over pulleys g g g and overacommon pulley The ends of ropes ffare connected to a hand-lever h, which is weighted, as at h, to keep the ropes properly taut at all times.

If the elevator-boy wishes to apply the brakes, he depresses the lever h to cause the withdrawal of bolt 11 and the consequent dis engagement of rope e \Vhat I claim is- The combination of an elevator-cage aand cable 0 with bearings d, eccentric disks 6, pivoted thereto, and with levers 6', eyes '6, bolts 2', hand-ropes f, secured thereto, and ropes 6 having eyes 6 through which the bolts pass, substantially as specified.

ll. II. TIIAYER.

Witnesses:

F. V. BRIESEN, A. J ONGHMANS. 

